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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '031ed2b1db7c7d97d479551fe73efedd11b733ae6dd4a0c00426caa063033061' 
  AND token = 'EfWL//+l11hmM0Pb7B7jCa47e8Ufl7IQk40ON/P5irs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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