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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4872748f58f331bcae94385f497f74c8618151d69cc86eb39757b64f96bf9b76' 
  AND token = 'u5Owv9WoeA3pPcZK93l3+2lM9uOZsqamy0osFCpEZfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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