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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6318ebba9dd0a6254dbebc39b83195e488973a5d64606e4b3177b343afb509b2' 
  AND token = 'PNLT5G/pKFRjcB1tuc+BVyPDTLw6O9asL2Fwc4Syv3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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