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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7f197931c70ee0355db10d739cea11a602ed0b7cfe45697fbd583e5de56664e5' 
  AND token = 'Vuv3DCLtue8CE+QLWAZha/QPU09rHbG7cPGiQIXEmJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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