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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bac7a813feaa34292f2093ef00d6b90f1f1dbb225caedca59b36eb398eb230a' 
  AND token = 'T7d38CiqfCeglDq27fKJeRZ0PhA+nkc6iNfuyMSmcLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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