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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd455ba42d33787c9608e83ad26c55c2ab9fcf590cbd9659e1d056b295892b8a' 
  AND token = '1+I1iOMwG3DlDo5sR1TGL6ISmv5dBfzcQGRJMrXU8vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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