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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '53399ad66671e9c19cc5ddcba16906e9d4c9bad92ddaecca312dcca58a417244' 
  AND token = 'ssXIkI0mt2fT42GfSY4UtgI0Vr0GRyjXTKbfRuKu2FI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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