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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26dee47ab12cd161cefc9e0f8818ad55d0f488e82f512f8af51255a9174f824c' 
  AND token = 'Od7Ez30kkuky0Kj/wueYqrRlLUwPv2UX7uaKWAkDPwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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