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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '048a6e3bfb54ae0952d31f782b08d5fdf17d3428b9a7af2861f53f4212619444' 
  AND token = 'h45oqY60Hjm8+y9A8f2lCwkHduP9Plf6UfiOhJwnyhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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