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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2b55832861b06b72f2be2d66f2b77c3de616737acc00b39f273e5962d2dbf82a' 
  AND token = 'yzkGKB0L2cDGCu51kfB1o+JuLuOFH2AJxtDOTlvjR+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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