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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04f3f00635f467d0220c505a0968df8e16a435e8639b9d61e5d1a1f973475e69' 
  AND token = '+e9fUV8JW+Exb69fGQAiCKcEM6kORDX45BjxyuIx5qE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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