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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bb609c6f49cf7c29dfa2beccfdf8c23cb6d868a9690f43d1c575434eeb8624b' 
  AND token = 'AadBlV58pASbhOK9IZwOb5dYrDB0u35dieSCZiqZQvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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