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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd41070beb08d44eb96cdbb9f4df939135bb92d3ab034358e2d9a7d920c245a81' 
  AND token = 'JWKFgnClw/Me6v8aw0gF+l1ePcJFsmg09nvQkWraeWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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