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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7be59de2110b1584808518eb94b9cc23b27e24f09d9a0065f218b8a95be3734a' 
  AND token = 'gKeNatAzRDqM0yvZMLdikD1fCg19LOQ6TeZhQzX0dHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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