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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '479f252524f0465fd0381a62dfa053193e0415d507730169913b46c1b2a1e376' 
  AND token = 'TquldpJ6eNTzRlbLXuiI2D0JdmIiEVe+8AI61fN6054=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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