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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66aa938ddaf0fa4489b3727a016e01557338b6eb6883b65098010b07a5ebbcd8' 
  AND token = 'udexOjt7+OppxsUzWoaNAeUuyJA9+hFYVE2ZF3Qj9K8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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