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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5875c320b9088f7abc77419414c6ad47d00d61104b6a1badb98d39880fd0745' 
  AND token = '3uladQW9AnToJUUtT9WB1TX+U1Sl7t2X/k+132If+RA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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