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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a037309bd43156cdbaeb950040d25b6564152f70f199d34fa0c2ac115a2562ca' 
  AND token = '58ev+OWD4CCTVgnmEN6xJi2+X6ffdOOQ2rO3vW+3H8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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