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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cfdbfc9456a0d5514e7b885093493f56a0d996dcd3f176a6f5c72dcdb3ae4840' 
  AND token = 'eNWptB4TgyXjRUaRS/KaMthHI8E61t68HD2rvt5SgF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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