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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f120329bd79cad2f847f08fa788bef2febf8509847efa3def402dcf02c80b0f2' 
  AND token = 'nkoS8kFATrfiLPLi4AMyMpYrBdeyppkd7MFyfY/ZGrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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