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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e43b186bf8467e3522165d2ccf13ba72d80991980ce3acd6ada1ae2c3e68b8de' 
  AND token = 'eH595dVLOGPEqo6sJJ2uyG1MkJnCAqWXRqCGOFDk33k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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