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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b61327b50fa1c862d5a2403d3406bb0aa324098f29dbe427796a195e446243b' 
  AND token = 'Q0WA7SGolVnsMu7a8RydL/hpJ6Mi3zMXV/DLyKcDYEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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