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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5f0b59949fe7d8ff6fbaecdd4487285e7f375d25d62b9d627d012e5b68ae25fb' 
  AND token = 'tFuuSUaMsDui9wCT4NrzeUeE90vR0DcCzCdl2KTHFDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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