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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '77306e7cb8d8e838738ad6d67b22fcb1daebe910ac3aef9d5810d6d4b767e893' 
  AND token = 'DI59uZqv3uVETwPcXkEdcCwl1y2tKGNonTx4kAx+nYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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