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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9317736f2bee58ea006b93df49cfaf23efa6854ce27acab4324ca6b4b6550ef7' 
  AND token = 'ftedMKQfBpBMdeM3fz75/4Yp2oSOMTpHDAhsO32jY+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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