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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '109cf29a2ddfcb73c18efa0ea4c9712bdb79ab76172691adebc71528287d29ba' 
  AND token = '0gqPpuYHi6FRQsf9biGz1WGsPpZ5w6/Mtr/lrCMGiFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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