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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e1a2588c835b333ca9cbf568c1d3f80b584a2bded27132da2f2941a2bd9430a' 
  AND token = 'nQ9544ClayfaqI6MNP4nFCgnWWpNCgDYLyVojqgJD+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00084

JSON explain

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