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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe8d818961323b83c9b29c1fcfa2d4e12771524ce1c996ce0d79b3547c035f8e' 
  AND token = 'M0ue6N2a0a11W5F9aUS0sgFDdPbwrPP2MpMXP03r9uU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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