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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83a48645e50dc2aceea3a977742520fc198b3a5c031b4df603f8b842aad62835' 
  AND token = 'KP0VaHN7m21jlF1sbhXN1An5U7dhoRrpM6X++1YGMA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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