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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f9614f45ab6b759120d15470691a2f9594e0732d08a174928b3f840acf2d95b' 
  AND token = 'GUhJatRmANi0pJ1QLSMbHjyiIdww8yLCNuSh9TEQ4UA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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