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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9654f7d906df40ebef66e19a17e25744c476f34a051abf65ff4442206005b150' 
  AND token = 'V0aWOS91Ad6FfIH/9XDmQOfalH0XiOeDjlXBbFLJ6C0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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