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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8625943d9ccbfc7570b1d4e66e88e5a72976b51426ccb32b4e68305cfb17d287' 
  AND token = 'HPJu+90gmWF+RUp589xTNkqJaIsnXG38dOLNK0PsEQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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