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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '694555c31c01e6f3341dc6c1221520839440c93b52863f3ec3680727dee1582e' 
  AND token = 'Gf3UBEukxitvtXKzO50V6M68ClxfMj23kBg6WLW4NuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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