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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eb93c0276f239e6d8d70d9cb3b1bf071b877cc112c151f73df9034f0f333bcc1' 
  AND token = 'T7RT11M14//Q3VMlJ47ThmgYCosGH0RKgFj/Wr/nksY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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