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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1abaca42fb155c78c221f23163abd5e214264d7fa291d74f125a0ab21d0f9d2e' 
  AND token = 'VN135Z/E1rZhYKAIcOl/HM6z5/dQAfCh17vYDFnngjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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