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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1030011e61f71d71855676d7548f765e1fedea0f7c35a76650c5ad7f9731125b' 
  AND token = 'iZhob7i7BtC4hN2/PQ8PS6d5/wzeGDZ87n6ClSmW6OM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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