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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13a46eee3245db8c00b791b834ac487dc780bb57e103ce4cfe17f081ff6f0d0b' 
  AND token = 'f9hlILJPUNDua/4q0cFlPQpNNH/Hpgkw6qCch6ZAz3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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