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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '57e6a72bba5bc5cddc7a8ab6825ee7629de6050a18c00e0c54bdf15ce41a9d8d' 
  AND token = 'Ve3mPUUYnSAGx+THSgOdr2w6wCVgYP/HubcJgeLuTuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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