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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66c6eee7c9a50c1d1b1c454b133c41aa9a72aac6a7fd80056661d6ab6a963f0e' 
  AND token = 'mbKBFXyOSln05LVyf/QeU9NEp1CaSpAkwDmLO391q+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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