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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '636afb7dc502b717410a3207c10fe8a569f25b058b2a5ee48dfcd2ebb688c9e3' 
  AND token = '95K4Dmgn7fXyux5gzE352a7g6Mr6nfoBhKKe9OccMGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00090

JSON explain

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