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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed12007533970b440bcde5d49440b46cd63d8f450c880d4d6c01418750394b27' 
  AND token = '/3e902A247J9RowPoQZikZEWFDv64Kqm1sVLy+Tz+qU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}