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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '05febafab13dbc66a0b7e4c4c47a67a7de967aa28ff8daf8c04804233aac5227' 
  AND token = 'A5j7H3nr8HVnaP6kSsY0TvwDSKL8lYVHkQB2m2RomAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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