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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af7232a1f9dd81b0498432f162bb11f4ec3b2565a6546719a2cc241d9dc412a5' 
  AND token = '2IeTZVOI0CokBxmjD6XmblNYmnmaThvfakD/jw0rdJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00186

JSON explain

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