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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2602b01fb44677c0be6eb9e141ad0fe901a2d26a7e7eb464e42d52f8393366b4' 
  AND token = 'H2MJIZJiLKLp/6btD/JhRC4kngMSnAqs8c8WJSegBFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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