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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '333c06e35516c8285fcd0fc4db27253e83210faa283f4e6c52da54d00ebce62a' 
  AND token = 'ZKdv0w1+eeX2lc/cov2tQYn+I9sqOv9CfwSbOMkgvO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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